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Proceedings Paper

Design and performance of a resonant roller wedge actuator
Author(s): Jeremy Eli Frank; Gary H. Koopmann; Weicheng Chen; Eric Michael Mockensturm; George Andre Lesieutre
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Paper Abstract

A compact rotary motor driven by piezoelectric bimorph actuators was developed for applications in adaptive, conformable structures for flow control. Using a roller wedge (rotary roller clutch) as its central motion rectifying element, the actuator converts electrical power to mechanical power by way of a set of resonating bimorph/mass systems. With this type of resonant drive system, the output mechanical power of the actuator was dramatically improved over previous inchworm-type designs. Also, the actuator cost was kept low by using commercial roller clutches and bimorph actuators instead of PZT stacks. Within an application size constraint of 4 x 4 x 1.75 inches, the unloaded speed was 600 RPM, the stall torque was 0.5 N-m, and the peak output power was nearly 4 watts. The motor is driven by a single frequency sinusoidal input, resulting in significant improvements of the cost, size and complexity over typical piezoelectric actuator drivers. Since the backlash of the roller clutch is a critical parameter in assessing the motor performance, an experimental study was performed to better understand its dynamics.

Paper Details

Date Published: 22 June 2000
PDF: 9 pages
Proc. SPIE 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems, (22 June 2000); doi: 10.1117/12.388824
Show Author Affiliations
Jeremy Eli Frank, The Pennsylvania State Univ. (United States)
Gary H. Koopmann, The Pennsylvania State Univ. (United States)
Weicheng Chen, The Pennsylvania State Univ. (United States)
Eric Michael Mockensturm, The Pennsylvania State Univ. (United States)
George Andre Lesieutre, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 3985:
Smart Structures and Materials 2000: Smart Structures and Integrated Systems
Norman M. Wereley, Editor(s)

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